InetrfaceProducts NXP / PCA9632

This is a driver code for the PCA9632 is an I2C-bus controlled 4-bit LED driver optimized for Red/Green/Blue/Amber (RGBA) color mixing applications. In Individual brightness control mode, each LED output has its own 8-bit resolution (256 steps) fixed frequency Individual PWM controller that operates at 1.5625 kHz with a duty cycle that is adjustable from 0 % to 99.6 % to allow the LED to be set to a specific brightness value. This library including device class and "LedPwmOut class API" for ease of use.

Dependencies:   CompLedDvr

Dependents:   PCA9632_Hello

Please refer to the component page for details

The PCA9632 is an I²C-bus controlled 4-bit LED driver optimized for Red/Green/Blue/Amber (RGBA) color mixing applications.

High-level API is available

A high-level API that can be used as the "PwmOut" of bed-SDK is available.
This API enables to make instances of each LED output pins and control PWM duty cycle by assignment.
For detail information, refer API document of LedPwmOut Class class which is included in PCA962xA class library.

#include "mbed.h"
#include "PCA9632.h"

PCA9632     led_cntlr( p28, p27, 0xC4 );  //  SDA, SCL, Slave_address(option)
LedPwmOut   led( led_cntlr, L0 );

int main()
{
    while( 1 ) {
        for( float p = 0.0f; p < 1.0f; p += 0.1f ) {
            led     = p;
            wait( 0.1 );
        }
    }
}

PCA9632.cpp@2:3574bf73abf5, 2015-03-19 (annotated)

Committer:
nxp_ip
Date:
Thu Mar 19 10:34:33 2015 +0000
Revision:
2:3574bf73abf5
Parent:
0:da1fe3fe7093 
API document update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nxp_ip 0:da1fe3fe7093 1 #include "mbed.h"
nxp_ip 0:da1fe3fe7093 2 #include "PCA9632.h"
nxp_ip 0:da1fe3fe7093 3
nxp_ip 0:da1fe3fe7093 4 PCA9632::PCA9632( PinName i2c_sda, PinName i2c_scl, char i2c_address )
nxp_ip 0:da1fe3fe7093 5 : i2c_p( new I2C( i2c_sda, i2c_scl ) ), i2c( *i2c_p ), address( i2c_address )
nxp_ip 0:da1fe3fe7093 6 {
nxp_ip 0:da1fe3fe7093 7 initialize();
nxp_ip 0:da1fe3fe7093 8 }
nxp_ip 0:da1fe3fe7093 9
nxp_ip 0:da1fe3fe7093 10 PCA9632::PCA9632( I2C &i2c_, char i2c_address )
nxp_ip 0:da1fe3fe7093 11 : i2c_p( NULL ), i2c( i2c_ ), address( i2c_address )
nxp_ip 0:da1fe3fe7093 12 {
nxp_ip 0:da1fe3fe7093 13 initialize();
nxp_ip 0:da1fe3fe7093 14 }
nxp_ip 0:da1fe3fe7093 15
nxp_ip 0:da1fe3fe7093 16 PCA9632::~PCA9632()
nxp_ip 0:da1fe3fe7093 17 {
nxp_ip 0:da1fe3fe7093 18 if ( NULL != i2c_p )
nxp_ip 0:da1fe3fe7093 19 delete i2c_p;
nxp_ip 0:da1fe3fe7093 20 }
nxp_ip 0:da1fe3fe7093 21
nxp_ip 0:da1fe3fe7093 22 void PCA9632::initialize( void )
nxp_ip 0:da1fe3fe7093 23 {
nxp_ip 0:da1fe3fe7093 24 char init_array0[] = {
nxp_ip 0:da1fe3fe7093 25 AUTO_INCREMENT | REGISTER_START, // Command
nxp_ip 0:da1fe3fe7093 26 0x01, 0x00, // MODE1, MODE2
nxp_ip 0:da1fe3fe7093 27 };
nxp_ip 0:da1fe3fe7093 28 char init_array1[] = {
nxp_ip 0:da1fe3fe7093 29 AUTO_INCREMENT | LEDOUT, // Command
nxp_ip 0:da1fe3fe7093 30 0xAA, // LEDOUT
nxp_ip 0:da1fe3fe7093 31 };
nxp_ip 0:da1fe3fe7093 32
nxp_ip 0:da1fe3fe7093 33 write( init_array0, sizeof( init_array0 ) );
nxp_ip 0:da1fe3fe7093 34 write( init_array1, sizeof( init_array1 ) );
nxp_ip 0:da1fe3fe7093 35 }
nxp_ip 0:da1fe3fe7093 36
nxp_ip 0:da1fe3fe7093 37 void PCA9632::reset( void )
nxp_ip 0:da1fe3fe7093 38 {
nxp_ip 0:da1fe3fe7093 39 char va[] = { 0xA5, 0x5A };
nxp_ip 0:da1fe3fe7093 40 i2c.write( 0x06, va, sizeof( va ) );
nxp_ip 0:da1fe3fe7093 41 }
nxp_ip 0:da1fe3fe7093 42
nxp_ip 0:da1fe3fe7093 43 void PCA9632::pwm( int port, float v )
nxp_ip 0:da1fe3fe7093 44 {
nxp_ip 0:da1fe3fe7093 45 char reg_addr;
nxp_ip 0:da1fe3fe7093 46
nxp_ip 0:da1fe3fe7093 47 if ( port < N_OF_PORTS ) {
nxp_ip 0:da1fe3fe7093 48 reg_addr = PWM_REGISTER_START + port;
nxp_ip 0:da1fe3fe7093 49 write( reg_addr, (char)(v * 255.0) );
nxp_ip 0:da1fe3fe7093 50 } else {
nxp_ip 0:da1fe3fe7093 51 float va[ N_OF_PORTS ];
nxp_ip 0:da1fe3fe7093 52
nxp_ip 0:da1fe3fe7093 53 for ( int i = 0; i < N_OF_PORTS; i++ )
nxp_ip 0:da1fe3fe7093 54 va[ i ] = v;
nxp_ip 0:da1fe3fe7093 55
nxp_ip 0:da1fe3fe7093 56 pwm( va );
nxp_ip 0:da1fe3fe7093 57 }
nxp_ip 0:da1fe3fe7093 58 }
nxp_ip 0:da1fe3fe7093 59
nxp_ip 0:da1fe3fe7093 60 void PCA9632::pwm( float *vp )
nxp_ip 0:da1fe3fe7093 61 {
nxp_ip 0:da1fe3fe7093 62 char data[ N_OF_PORTS + 1 ];
nxp_ip 0:da1fe3fe7093 63
nxp_ip 0:da1fe3fe7093 64 *data = PWM_REGISTER_START;
nxp_ip 0:da1fe3fe7093 65
nxp_ip 0:da1fe3fe7093 66 for ( int i = 1; i <= N_OF_PORTS; i++ )
nxp_ip 0:da1fe3fe7093 67 data[ i ] = (char)(*vp++ * 255.0);
nxp_ip 0:da1fe3fe7093 68
nxp_ip 0:da1fe3fe7093 69 write( data, sizeof( data ) );
nxp_ip 0:da1fe3fe7093 70 }
nxp_ip 0:da1fe3fe7093 71
nxp_ip 0:da1fe3fe7093 72 void PCA9632::write( char *data, int length )
nxp_ip 0:da1fe3fe7093 73 {
nxp_ip 0:da1fe3fe7093 74 *data |= AUTO_INCREMENT;
nxp_ip 0:da1fe3fe7093 75 i2c.write( address, data, length );
nxp_ip 0:da1fe3fe7093 76 }
nxp_ip 0:da1fe3fe7093 77
nxp_ip 0:da1fe3fe7093 78 void PCA9632::write( char reg_addr, char data )
nxp_ip 0:da1fe3fe7093 79 {
nxp_ip 0:da1fe3fe7093 80 char c[2];
nxp_ip 0:da1fe3fe7093 81
nxp_ip 0:da1fe3fe7093 82 c[0] = reg_addr;
nxp_ip 0:da1fe3fe7093 83 c[1] = data;
nxp_ip 0:da1fe3fe7093 84
nxp_ip 0:da1fe3fe7093 85 i2c.write( address, c, 2 );
nxp_ip 0:da1fe3fe7093 86 }
nxp_ip 0:da1fe3fe7093 87
nxp_ip 0:da1fe3fe7093 88 void PCA9632::read( char reg_addr, char *data, int length )
nxp_ip 0:da1fe3fe7093 89 {
nxp_ip 0:da1fe3fe7093 90 reg_addr |= 0x80;
nxp_ip 0:da1fe3fe7093 91 i2c.write( address, (char *)(&reg_addr), 1, true );
nxp_ip 0:da1fe3fe7093 92 i2c.read( address, data, length );
nxp_ip 0:da1fe3fe7093 93 }
nxp_ip 0:da1fe3fe7093 94
nxp_ip 0:da1fe3fe7093 95 char PCA9632::read( char reg_addr )
nxp_ip 0:da1fe3fe7093 96 {
nxp_ip 0:da1fe3fe7093 97 i2c.write( address, (char *)(&reg_addr), 1, true );
nxp_ip 0:da1fe3fe7093 98 i2c.read( address, (char *)(&reg_addr), 1 );
nxp_ip 0:da1fe3fe7093 99
nxp_ip 0:da1fe3fe7093 100 return ( reg_addr );
nxp_ip 0:da1fe3fe7093 101 }